Home / 30,660.17-42,314.94-18,720.98

Finding the Fourth Proportional to 30,660.17, 42,314.94 and 18,720.98

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Solution

The fourth proportional to 30,660.17, 42,314.94 and 18,720.98 is: 25,837.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,660.17 : 42,314.94 = 18,720.98 : x
  2. Step 2: Convert to fraction form
    30,660.17/42,314.94 = 18,720.98/x
  3. Step 3: Cross multiply
    30,660.17x = 42,314.94 × 18,720.98
  4. Step 4: Simplify right side
    30,660.17x = 792,176,933.87
  5. Step 5: Solve for x
    x = 792,176,933.87/30,660.17
  6. Step 6: Final answer
    x = 25,837.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.